How is a high blood pressure built up in a glomerulus? Why is this high blood pressure needed?
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The efferent arteriole has a smaller diameter than the afferent arteriole. This causes a blood back-up in the glomerular capillaries. Therefore, fluid and solute are forced out from the blood and into the glomerular capsule. ... Thus there is a blood colloid osmotic pressure ( BCOP ) of 30 mmHg that opposes filtration.....
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The afferent artery is wider than efferent artery so when the blood moves from afferent artery to efferent artery a high pressure is developed.
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